:root {
    --primary-color: #2a2a2a;
    --secondary-color: #3a3a3a;
    --text-color: #ffffff;
    --accent-color: #00ff9d;
    --error-color: #ff4757;
    --success-color: #2ed573;
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
}

[data-theme="light"] {
    --primary-color: #ffffff;
    --secondary-color: #f5f6fa;
    --text-color: #2a2a2a;
    --glass-bg: rgba(0, 0, 0, 0.05);
    --glass-border: rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--primary-color);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
}

body.transition {
    transition: background 0.3s ease, color 0.3s ease;
}

.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

.particle {
    position: absolute;
    background: var(--accent-color);
    border-radius: 50%;
    opacity: 0.3;
    animation: float 15s infinite linear;
}

@keyframes float {
    0% { transform: translateY(0) rotate(0deg); }
    100% { transform: translateY(-100vh) rotate(360deg); }
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.header {
    text-align: center;
    margin-bottom: 2rem;
    padding: 1rem;
    background: var(--glass-bg);
    /*backdrop-filter: blur(10px);*/
    border-radius: 15px;
    border: 1px solid var(--glass-border);
}

.title {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    text-align: center;
    background: linear-gradient(45deg, var(--accent-color), #ffff00);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.ttext {
    font-size: 0.8rem;
    margin: 0 auto;
    margin-bottom: 0.1rem;
    background: linear-gradient(
        to right,
        #ff0000,
        #ff7f00,
        #ffff00,
        #00ff00,
        #0000ff,
        #4b0082,
        #8f00ff
    );
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: rainbow-shine 4s linear infinite;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
    position: relative;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.ttext::after {
    content: inherit;
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        45deg,
        transparent 0%,
        rgba(255, 255, 255, 0.8) 50%,
        transparent 100%
    );
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: shine 2s linear infinite;
    display: flex;
    justify-content: center;
    align-items: center;
}

@keyframes rainbow-shine {
    to {
        background-position: 200% center;
    }
}

@keyframes shine {
    from {
        background-position: -200% center;
    }
    to {
        background-position: 200% center;
    }
}

.main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.text-area {
    background: var(--glass-bg);
    /*backdrop-filter: blur(10px);*/
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    padding: 1rem;
    min-height: 300px;
    resize: vertical;
    color: var(--text-color);
    font-size: 1rem;
    width: 100%;
}

.search-replace {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.search-replace input {
    flex: 1;
    padding: 0.5rem;
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    background: var(--glass-bg);
    color: var(--text-color);
}

.search-replace button {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 10px;
    background: var(--glass-bg);
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.search-replace button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.search-replace label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 10px;
    background: var(--glass-bg);
    color: var(--text-color);
    font-size: 1rem;
    cursor: pointer;
    /*backdrop-filter: blur(10px);*/
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
    /*min-width: 120px;  /* Add this line */
    /*max-width: 80%;   /* Add this line */
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn i {
    font-size: 1.2rem;
}

/*#clearHistory {*/
    /*margin-top: 1.2rem;*/
    /*background-color: var(--error-color);*/
    /*color: white;*/
    /*width: 100%;*/
/*}*/
/**/
/*#clearHistory:hover {*/
    /*transform: translateY(-2px);*/
    /*box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);*/
    /*background-color: #ff2a3d;*/
/*}*/
/**/
/*#clearHistory i {*/
    /*margin-right: 0.5rem;*/
/*}*/

.theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem;
    border-radius: 50%;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    cursor: pointer;
    z-index: 100;
}

.notification {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 1rem 2rem;
    border-radius: 10px;
    background: var(--success-color);
    color: white;
    transform: translateX(200%);
    animation: slideIn 0.3s forwards;
}

@keyframes slideIn {
    to { transform: translateX(0); }
}

.file-drop {
    border: 2px dashed var(--glass-border);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    margin-bottom: 1rem;
}

.file-drop.drag-over {
    border-color: var(--accent-color);
    background: rgba(0, 255, 157, 0.1);
}

.history {
    background: var(--glass-bg);
    /*backdrop-filter: blur(10px);*/
    border-radius: 15px;
    padding: 1rem;
    margin-top: 2rem;
    max-height: 200px;
    overflow-y: auto;
}

.history-item {
    padding: 0.5rem;
    border-bottom: 1px solid var(--glass-border);
    cursor: pointer;
}

.history-item:hover {
    background: var(--glass-bg);
}

@media (max-width: 768px) {
    .main {
        grid-template-columns: 1fr;
    }
}

.help-section {
    text-align: center;
    margin: 2rem auto;
    max-width: 800px;
    padding: 0 1rem;
}

.help-section p {
    margin: 0.5rem 0;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.help-section strong {
    color: var(--accent-color);
}:root {
    --primary-color: #2a2a2a;
    --secondary-color: #3a3a3a;
    --text-color: #ffffff;
    --accent-color: #00ff9d;
    --error-color: #ff4757;
    --success-color: #2ed573;
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
}

[data-theme="light"] {
    --primary-color: #ffffff;
    --secondary-color: #f5f6fa;
    --text-color: #2a2a2a;
    --glass-bg: rgba(0, 0, 0, 0.05);
    --glass-border: rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--primary-color);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
}

body.transition {
    transition: background 0.3s ease, color 0.3s ease;
}

.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

.particle {
    position: absolute;
    background: var(--accent-color);
    border-radius: 50%;
    opacity: 0.3;
    animation: float 15s infinite linear;
}

@keyframes float {
    0% { transform: translateY(0) rotate(0deg); }
    100% { transform: translateY(-100vh) rotate(360deg); }
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.header {
    text-align: center;
    margin-bottom: 2rem;
    padding: 1rem;
    background: var(--glass-bg);
    /*backdrop-filter: blur(10px);*/
    border-radius: 15px;
    border: 1px solid var(--glass-border);
}

.title {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    text-align: center;
    background: linear-gradient(45deg, var(--accent-color), #ffff00);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.ttext {
    font-size: 0.8rem;
    margin: 0 auto;
    margin-bottom: 0.1rem;
    background: linear-gradient(
        to right,
        #ff0000,
        #ff7f00,
        #ffff00,
        #00ff00,
        #0000ff,
        #4b0082,
        #8f00ff
    );
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: rainbow-shine 4s linear infinite;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
    position: relative;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.ttext::after {
    content: inherit;
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        45deg,
        transparent 0%,
        rgba(255, 255, 255, 0.8) 50%,
        transparent 100%
    );
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: shine 2s linear infinite;
    display: flex;
    justify-content: center;
    align-items: center;
}

@keyframes rainbow-shine {
    to {
        background-position: 200% center;
    }
}

@keyframes shine {
    from {
        background-position: -200% center;
    }
    to {
        background-position: 200% center;
    }
}

.main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.text-area {
    background: var(--glass-bg);
    /*backdrop-filter: blur(10px);*/
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    padding: 1rem;
    min-height: 300px;
    resize: vertical;
    color: var(--text-color);
    font-size: 1rem;
    width: 100%;
}

.search-replace {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.search-replace input {
    flex: 1;
    padding: 0.5rem;
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    background: var(--glass-bg);
    color: var(--text-color);
}

.search-replace button {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 10px;
    background: var(--glass-bg);
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.search-replace button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.search-replace label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 10px;
    background: var(--glass-bg);
    color: var(--text-color);
    font-size: 1rem;
    cursor: pointer;
    /*backdrop-filter: blur(10px);*/
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
    /*min-width: 120px;  /* Add this line */
    /*max-width: 80%;   /* Add this line */
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn i {
    font-size: 1.2rem;
}

/*#clearHistory {*/
    /*margin-top: 1.2rem;*/
    /*background-color: var(--error-color);*/
    /*color: white;*/
    /*width: 100%;*/
/*}*/
/**/
/*#clearHistory:hover {*/
    /*transform: translateY(-2px);*/
    /*box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);*/
    /*background-color: #ff2a3d;*/
/*}*/
/**/
/*#clearHistory i {*/
    /*margin-right: 0.5rem;*/
/*}*/

.theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem;
    border-radius: 50%;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    cursor: pointer;
    z-index: 100;
}

.notification {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 1rem 2rem;
    border-radius: 10px;
    background: var(--success-color);
    color: white;
    transform: translateX(200%);
    animation: slideIn 0.3s forwards;
}

@keyframes slideIn {
    to { transform: translateX(0); }
}

.file-drop {
    border: 2px dashed var(--glass-border);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    margin-bottom: 1rem;
}

.file-drop.drag-over {
    border-color: var(--accent-color);
    background: rgba(0, 255, 157, 0.1);
}

.history {
    background: var(--glass-bg);
    /*backdrop-filter: blur(10px);*/
    border-radius: 15px;
    padding: 1rem;
    margin-top: 2rem;
    max-height: 200px;
    overflow-y: auto;
}

.history-item {
    padding: 0.5rem;
    border-bottom: 1px solid var(--glass-border);
    cursor: pointer;
}

.history-item:hover {
    background: var(--glass-bg);
}

@media (max-width: 768px) {
    .main {
        grid-template-columns: 1fr;
    }
}

.help-section {
    text-align: center;
    margin: 2rem auto;
    max-width: 800px;
    padding: 0 1rem;
}

.help-section p {
    margin: 0.5rem 0;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.help-section strong {
    color: var(--accent-color);
}:root {
    --primary-color: #2a2a2a;
    --secondary-color: #3a3a3a;
    --text-color: #ffffff;
    --accent-color: #00ff9d;
    --error-color: #ff4757;
    --success-color: #2ed573;
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
}

[data-theme="light"] {
    --primary-color: #ffffff;
    --secondary-color: #f5f6fa;
    --text-color: #2a2a2a;
    --glass-bg: rgba(0, 0, 0, 0.05);
    --glass-border: rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--primary-color);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
}

body.transition {
    transition: background 0.3s ease, color 0.3s ease;
}

.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

.particle {
    position: absolute;
    background: var(--accent-color);
    border-radius: 50%;
    opacity: 0.3;
    animation: float 15s infinite linear;
}

@keyframes float {
    0% { transform: translateY(0) rotate(0deg); }
    100% { transform: translateY(-100vh) rotate(360deg); }
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.header {
    text-align: center;
    margin-bottom: 2rem;
    padding: 1rem;
    background: var(--glass-bg);
    /*backdrop-filter: blur(10px);*/
    border-radius: 15px;
    border: 1px solid var(--glass-border);
}

.title {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    text-align: center;
    background: linear-gradient(45deg, var(--accent-color), #ffff00);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.ttext {
    font-size: 0.8rem;
    margin: 0 auto;
    margin-bottom: 0.1rem;
    background: linear-gradient(
        to right,
        #ff0000,
        #ff7f00,
        #ffff00,
        #00ff00,
        #0000ff,
        #4b0082,
        #8f00ff
    );
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: rainbow-shine 4s linear infinite;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
    position: relative;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.ttext::after {
    content: inherit;
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        45deg,
        transparent 0%,
        rgba(255, 255, 255, 0.8) 50%,
        transparent 100%
    );
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: shine 2s linear infinite;
    display: flex;
    justify-content: center;
    align-items: center;
}

@keyframes rainbow-shine {
    to {
        background-position: 200% center;
    }
}

@keyframes shine {
    from {
        background-position: -200% center;
    }
    to {
        background-position: 200% center;
    }
}

.main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.text-area {
    background: var(--glass-bg);
    /*backdrop-filter: blur(10px);*/
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    padding: 1rem;
    min-height: 300px;
    resize: vertical;
    color: var(--text-color);
    font-size: 1rem;
    width: 100%;
}

.search-replace {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.search-replace input {
    flex: 1;
    padding: 0.5rem;
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    background: var(--glass-bg);
    color: var(--text-color);
}

.search-replace button {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 10px;
    background: var(--glass-bg);
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.search-replace button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.search-replace label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 10px;
    background: var(--glass-bg);
    color: var(--text-color);
    font-size: 1rem;
    cursor: pointer;
    /*backdrop-filter: blur(10px);*/
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
    /*min-width: 120px;  /* Add this line */
    /*max-width: 80%;   /* Add this line */
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn i {
    font-size: 1.2rem;
}

/*#clearHistory {*/
    /*margin-top: 1.2rem;*/
    /*background-color: var(--error-color);*/
    /*color: white;*/
    /*width: 100%;*/
/*}*/
/**/
/*#clearHistory:hover {*/
    /*transform: translateY(-2px);*/
    /*box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);*/
    /*background-color: #ff2a3d;*/
/*}*/
/**/
/*#clearHistory i {*/
    /*margin-right: 0.5rem;*/
/*}*/

.theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem;
    border-radius: 50%;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    cursor: pointer;
    z-index: 100;
}

.notification {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 1rem 2rem;
    border-radius: 10px;
    background: var(--success-color);
    color: white;
    transform: translateX(200%);
    animation: slideIn 0.3s forwards;
}

@keyframes slideIn {
    to { transform: translateX(0); }
}

.file-drop {
    border: 2px dashed var(--glass-border);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    margin-bottom: 1rem;
}

.file-drop.drag-over {
    border-color: var(--accent-color);
    background: rgba(0, 255, 157, 0.1);
}

.history {
    background: var(--glass-bg);
    /*backdrop-filter: blur(10px);*/
    border-radius: 15px;
    padding: 1rem;
    margin-top: 2rem;
    max-height: 200px;
    overflow-y: auto;
}

.history-item {
    padding: 0.5rem;
    border-bottom: 1px solid var(--glass-border);
    cursor: pointer;
}

.history-item:hover {
    background: var(--glass-bg);
}

@media (max-width: 768px) {
    .main {
        grid-template-columns: 1fr;
    }
}

.help-section {
    text-align: center;
    margin: 2rem auto;
    max-width: 800px;
    padding: 0 1rem;
}

.help-section p {
    margin: 0.5rem 0;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.help-section strong {
    color: var(--accent-color);
}:root {
    --primary-color: #2a2a2a;
    --secondary-color: #3a3a3a;
    --text-color: #ffffff;
    --accent-color: #00ff9d;
    --error-color: #ff4757;
    --success-color: #2ed573;
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
}

[data-theme="light"] {
    --primary-color: #ffffff;
    --secondary-color: #f5f6fa;
    --text-color: #2a2a2a;
    --glass-bg: rgba(0, 0, 0, 0.05);
    --glass-border: rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--primary-color);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
}

body.transition {
    transition: background 0.3s ease, color 0.3s ease;
}

.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

.particle {
    position: absolute;
    background: var(--accent-color);
    border-radius: 50%;
    opacity: 0.3;
    animation: float 15s infinite linear;
}

@keyframes float {
    0% { transform: translateY(0) rotate(0deg); }
    100% { transform: translateY(-100vh) rotate(360deg); }
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.header {
    text-align: center;
    margin-bottom: 2rem;
    padding: 1rem;
    background: var(--glass-bg);
    /*backdrop-filter: blur(10px);*/
    border-radius: 15px;
    border: 1px solid var(--glass-border);
}

.title {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    text-align: center;
    background: linear-gradient(45deg, var(--accent-color), #ffff00);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.ttext {
    font-size: 0.8rem;
    margin: 0 auto;
    margin-bottom: 0.1rem;
    background: linear-gradient(
        to right,
        #ff0000,
        #ff7f00,
        #ffff00,
        #00ff00,
        #0000ff,
        #4b0082,
        #8f00ff
    );
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: rainbow-shine 4s linear infinite;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
    position: relative;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.ttext::after {
    content: inherit;
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        45deg,
        transparent 0%,
        rgba(255, 255, 255, 0.8) 50%,
        transparent 100%
    );
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: shine 2s linear infinite;
    display: flex;
    justify-content: center;
    align-items: center;
}

@keyframes rainbow-shine {
    to {
        background-position: 200% center;
    }
}

@keyframes shine {
    from {
        background-position: -200% center;
    }
    to {
        background-position: 200% center;
    }
}

.main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.text-area {
    background: var(--glass-bg);
    /*backdrop-filter: blur(10px);*/
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    padding: 1rem;
    min-height: 300px;
    resize: vertical;
    color: var(--text-color);
    font-size: 1rem;
    width: 100%;
}

.search-replace {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.search-replace input {
    flex: 1;
    padding: 0.5rem;
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    background: var(--glass-bg);
    color: var(--text-color);
}

.search-replace button {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 10px;
    background: var(--glass-bg);
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.search-replace button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.search-replace label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 10px;
    background: var(--glass-bg);
    color: var(--text-color);
    font-size: 1rem;
    cursor: pointer;
    /*backdrop-filter: blur(10px);*/
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
    /*min-width: 120px;  /* Add this line */
    /*max-width: 80%;   /* Add this line */
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn i {
    font-size: 1.2rem;
}

/*#clearHistory {*/
    /*margin-top: 1.2rem;*/
    /*background-color: var(--error-color);*/
    /*color: white;*/
    /*width: 100%;*/
/*}*/
/**/
/*#clearHistory:hover {*/
    /*transform: translateY(-2px);*/
    /*box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);*/
    /*background-color: #ff2a3d;*/
/*}*/
/**/
/*#clearHistory i {*/
    /*margin-right: 0.5rem;*/
/*}*/

.theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem;
    border-radius: 50%;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    cursor: pointer;
    z-index: 100;
}

.notification {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 1rem 2rem;
    border-radius: 10px;
    background: var(--success-color);
    color: white;
    transform: translateX(200%);
    animation: slideIn 0.3s forwards;
}

@keyframes slideIn {
    to { transform: translateX(0); }
}

.file-drop {
    border: 2px dashed var(--glass-border);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    margin-bottom: 1rem;
}

.file-drop.drag-over {
    border-color: var(--accent-color);
    background: rgba(0, 255, 157, 0.1);
}

.history {
    background: var(--glass-bg);
    /*backdrop-filter: blur(10px);*/
    border-radius: 15px;
    padding: 1rem;
    margin-top: 2rem;
    max-height: 200px;
    overflow-y: auto;
}

.history-item {
    padding: 0.5rem;
    border-bottom: 1px solid var(--glass-border);
    cursor: pointer;
}

.history-item:hover {
    background: var(--glass-bg);
}

@media (max-width: 768px) {
    .main {
        grid-template-columns: 1fr;
    }
}

.help-section {
    text-align: center;
    margin: 2rem auto;
    max-width: 800px;
    padding: 0 1rem;
}

.help-section p {
    margin: 0.5rem 0;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.help-section strong {
    color: var(--accent-color);
}