:root {
    --primary-color: #6366f1;
    --primary-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --primary-hover: #4f46e5;
    --bg-dark: #0f172a;
    --text-light: #f8fafc;
    --text-dim: #94a3b8;
    --glass-bg: rgba(30, 41, 59, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    --danger: #ef4444;
    --danger-gradient: linear-gradient(135deg, #ef4444 0%, #f43f5e 100%);
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-light);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Background Animation */
/* Background Animation */
.mesh-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    background: radial-gradient(at 0% 0%, hsla(253, 16%, 7%, 1) 0, transparent 50%),
        radial-gradient(at 50% 0%, hsla(225, 39%, 30%, 1) 0, transparent 50%),
        radial-gradient(at 100% 0%, hsla(339, 49%, 30%, 1) 0, transparent 50%);
    background-size: 200% 200%;
    animation: gradient-move 15s ease infinite;
}

.mesh-background::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, transparent 30%, var(--bg-dark) 70%);
    z-index: 1;
    pointer-events: none;
}

.mesh-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.6;
    animation: orb-float 20s infinite alternate ease-in-out;
    will-change: transform;
}

.orb-1 {
    width: 50vw;
    height: 50vw;
    background: #4f46e5;
    top: -10vw;
    left: -10vw;
}

.orb-2 {
    width: 60vw;
    height: 60vw;
    background: #7c3aed;
    bottom: -10vw;
    right: -10vw;
    animation-direction: alternate-reverse;
}

@keyframes gradient-move {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

@keyframes orb-float {
    0% {
        transform: translate(0, 0) scale(1);
    }

    100% {
        transform: translate(10%, 10%) scale(1.1);
    }
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-light);
}

.logo i {
    color: var(--primary-color);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-info {
    color: var(--text-dim);
    font-size: 0.9rem;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.7rem 1.5rem;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.btn-primary:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0));
    opacity: 0;
    transition: 0.3s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -10px rgba(99, 102, 241, 0.5);
}

.btn-primary:hover:before {
    opacity: 1;
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-icon {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-light);
    width: 40px;
    height: 40px;
    border-radius: 8px;
    cursor: pointer;
    transition: 0.3s;
}

.btn-icon:hover {
    background: rgba(255, 255, 255, 0.1);
}

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

/* Glass Panel */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

/* Upload Section */
.upload-section h2,
.files-section h2 {
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.drop-zone {
    border: 2px dashed var(--glass-border);
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: 0.3s;
}

.drop-zone:hover,
.drop-zone.dragover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.15);
    box-shadow: 0 0 25px rgba(99, 102, 241, 0.2);
    transform: scale(1.01);
}

.drop-zone i {
    font-size: 3rem;
    color: var(--text-dim);
    margin-bottom: 1rem;
}

.drop-zone p {
    color: var(--text-dim);
}

/* File Grid */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.file-card {
    background: rgba(30, 41, 59, 0.4);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    animation: cardEntrance 0.5s ease-out backwards;
    will-change: transform;
}

/* Sheen Effect Layer */
.file-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.1) 50%, transparent);
    transform: skewX(-25deg);
    transition: 0.5s;
    pointer-events: none;
}

.file-card:hover {
    transform: translateY(-5px);
    border-color: rgba(99, 102, 241, 0.5);
    background: rgba(40, 50, 75, 0.6);
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

.file-card:hover::after {
    left: 150%;
    transition: 0.7s;
}

.file-card:hover .file-icon {
    transform: scale(1.1) rotate(5deg);
    color: #a855f7;
    filter: drop-shadow(0 0 10px rgba(168, 85, 247, 0.5));
}

@keyframes cardEntrance {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.file-icon {
    font-size: 2.5rem;
    color: var(--text-dim);
    margin-bottom: 1rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.file-name {
    font-weight: 600;
    margin-bottom: 0.5rem;
    word-break: break-all;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.file-meta {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-bottom: 1rem;
}

.file-actions {
    display: flex;
    gap: 0.5rem;
    width: 100%;
}

.btn-file {
    flex: 1;
    padding: 0.6rem;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    text-decoration: none;
}

.btn-download {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-light);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.btn-download:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.btn-delete {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.1);
}

.btn-delete:hover {
    background: var(--danger-gradient);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
    transform: translateY(-1px);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    animation: modalFadeIn 0.3s ease-out;
}

.modal-content {
    width: 100%;
    max-width: 400px;
    position: relative;
    animation: modalPopIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes modalPopIn {
    from {
        opacity: 0;
        transform: scale(0.8) translateY(-20px);
    }

    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.close-modal {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-dim);
}

.modal h2 {
    margin-bottom: 1.5rem;
    color: var(--text-light);
    text-align: center;
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-dim);
    font-size: 0.9rem;
}

.input-group input {
    width: 100%;
    padding: 0.8rem;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--text-light);
    outline: none;
    transition: 0.3s;
}

.input-group input:focus {
    border-color: var(--primary-color);
}

.btn-submit {
    width: 100%;
    padding: 0.9rem;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: var(--shadow-md);
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -10px rgba(99, 102, 241, 0.5);
}

.error-msg {
    color: var(--danger);
    font-size: 0.9rem;
    text-align: center;
    margin-top: 1rem;
    min-height: 1.2rem;
}

/* Responsive */
@media (max-width: 768px) {
    .file-grid {
        grid-template-columns: 1fr;
    }
}

.btn-logout {
    background: var(--danger-gradient);
    color: white;
    border: none;
    padding: 0.6rem 1.2rem;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.btn-logout:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0));
    opacity: 0;
    transition: 0.3s;
}

.btn-logout:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -10px rgba(239, 68, 68, 0.5);
}

.btn-logout:hover:before {
    opacity: 1;
}

.btn-back {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-light);
    border: 1px solid var(--glass-border);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s;
}

.btn-back:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(-3px);
    border-color: rgba(255, 255, 255, 0.3);
}

.actions-group {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.file-card.selected {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.2);
    box-shadow: 0 0 0 2px var(--primary-color);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-dim);
    font-size: 0.9rem;
    overflow-x: auto;
}

.crumb {
    cursor: pointer;
    transition: 0.2s;
    white-space: nowrap;
}

.crumb:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.crumb:after {
    content: '/';
    margin-left: 0.5rem;
    color: var(--glass-border);
}

.crumb:last-child {
    color: var(--text-light);
    font-weight: 600;
    cursor: default;
    text-decoration: none;
}

.crumb:last-child:after {
    display: none;
}.btn-preview {
    background: rgba(14, 165, 233, 0.1);
    color: #0ea5e9;
    border: 1px solid rgba(14, 165, 233, 0.1);
}

.btn-preview:hover {
    background: rgba(14, 165, 233, 0.2);
    border-color: rgba(14, 165, 233, 0.3);
    color: #38bdf8;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(14, 165, 233, 0.2);
}