/* 
  SanayiTech Premium Dark Theme
  Glassmorphism & Micro-animations
*/

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap');

:root {
    /* Color Palette */
    --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    
    --primary-color: #8b5cf6;
    --primary-hover: #a78bfa;
    --secondary-color: #3b82f6;
    --accent-glow: 0 0 20px rgba(139, 92, 246, 0.4);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    
    --success-color: #10b981;
    --danger-color: #ef4444;
    
    --border-radius-lg: 24px;
    --border-radius-md: 16px;
    --border-radius-sm: 8px;
    
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Outfit', sans-serif;
    background: var(--bg-gradient);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.5;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
}
::-webkit-scrollbar-thumb {
    background: var(--glass-border);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* --- App Layout --- */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* --- Header (Glassmorphism) --- */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-primary);
}

.logo svg {
    color: var(--primary-color);
    filter: drop-shadow(0 0 8px rgba(139, 92, 246, 0.6));
    animation: pulse 2s infinite alternate;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(to right, #fff, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-family: 'Outfit', sans-serif;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    outline: none;
    text-decoration: none;
}

.btn:active {
    transform: scale(0.95);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: var(--accent-glow);
    border: 1px solid rgba(255,255,255,0.1);
}

.btn-primary:hover {
    box-shadow: 0 0 30px rgba(139, 92, 246, 0.6);
    transform: translateY(-2px);
}

.btn-outline {
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
    border-radius: var(--border-radius-md);
}

/* --- Main Content --- */
.app-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

/* State Containers */
.empty-state {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    text-align: center;
    animation: fadeIn 0.5s ease-out;
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 0 20px rgba(255,255,255,0.2));
    animation: float 3s ease-in-out infinite;
}

.empty-state h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.empty-state p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 500px;
    margin-bottom: 2rem;
}

.action-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

/* --- File List Grid --- */
.files-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding: 0 1rem;
}

.file-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    padding: 1rem;
}

.file-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: var(--transition-smooth);
    box-shadow: var(--glass-shadow);
}

.file-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4), var(--accent-glow);
}

.file-name {
    font-weight: 600;
    font-size: 1.2rem;
    color: var(--text-primary);
    word-break: break-all;
}

.file-meta {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* --- Loader --- */
.loader {
    width: 60px;
    height: 60px;
    border: 4px solid var(--glass-border);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1.5rem;
}

/* --- Iframe Container --- */
#spreadsheet-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: #fff; /* Tablo arkaplanı her zaman beyaz olmalı */
    animation: fadeIn 0.3s ease-out;
}

#spreadsheet-iframe {
    width: 100%;
    flex: 1;
    border: none;
}

/* --- Modal (Glassmorphism) --- */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.modal-content {
    background: var(--bg-gradient);
    border: 1px solid var(--glass-border);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    margin: 10vh auto;
    padding: 2.5rem;
    border-radius: var(--border-radius-lg);
    width: 90%;
    max-width: 500px;
    color: var(--text-primary);
    animation: slideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.modal-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.modal-content input, .modal-content select {
    width: 100%;
    padding: 1rem;
    margin-bottom: 1rem;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition-fast);
}

.modal-content input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
    background: rgba(0, 0, 0, 0.4);
}

/* --- Forms & Login Container --- */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: var(--bg-gradient);
    position: relative;
    overflow: hidden;
}

/* Background Glowing Orbs for Login */
.login-container::before, .login-container::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.5;
    z-index: 0;
}

.login-container::before {
    background: var(--primary-color);
    top: -100px;
    left: -100px;
    animation: float 8s ease-in-out infinite alternate;
}

.login-container::after {
    background: var(--secondary-color);
    bottom: -100px;
    right: -100px;
    animation: float 10s ease-in-out infinite alternate-reverse;
}

.login-box {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    padding: 3rem;
    border-radius: var(--border-radius-lg);
    width: 100%;
    max-width: 420px;
    box-shadow: var(--glass-shadow);
    position: relative;
    z-index: 1;
    animation: scaleUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #fff, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 1rem;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-sm);
    color: white;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
}

.error-message {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #fca5a5;
    padding: 1rem;
    border-radius: var(--border-radius-sm);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    text-align: center;
}

/* --- Animations --- */
@keyframes spin { 100% { transform: rotate(360deg); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
    100% { transform: translateY(0px); }
}
@keyframes slideUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes scaleUp {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}
@keyframes pulse {
    from { opacity: 0.7; }
    to { opacity: 1; filter: drop-shadow(0 0 15px rgba(139, 92, 246, 0.8)); }
}

/* User Badge */
.user-badge {
    background: rgba(255,255,255,0.05);
    color: var(--text-primary);
    transition: var(--transition-fast);
}
.user-badge:hover {
    background: rgba(255,255,255,0.1) !important;
}

/* Hide Mobile utils */
@media (max-width: 768px) {
    .hide-mobile { display: none !important; }
    .show-mobile { display: block !important; }
    .app-header { padding: 1rem; }
    .empty-state { padding: 1.5rem; }
    .login-box { padding: 2rem; }
}