:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --bg-card: #1f1f1f;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;
    --accent-sky: #00bfff;
    --accent-sky-dark: #0099cc;
    --accent-sky-light: #4dd2ff;
    --border-color: #333333;
    --error: #ff4444;
    --success: #00ff88;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background: var(--bg-primary); color: var(--text-primary); min-height: 100vh; }

.login-page { display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%); }
.login-container { width: 100%; max-width: 420px; padding: 20px; }
.login-box { background: var(--bg-card); border-radius: 16px; padding: 40px; border: 1px solid var(--border-color); box-shadow: 0 0 40px rgba(0, 191, 255, 0.1); }
.login-box:hover { border-color: var(--accent-sky); box-shadow: 0 0 60px rgba(0, 191, 255, 0.2); }
.logo { text-align: center; font-size: 2rem; font-weight: 700; background: linear-gradient(135deg, var(--accent-sky-light) 0%, var(--accent-sky) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; margin-bottom: 8px; }
.tagline { text-align: center; color: var(--text-secondary); font-size: 0.95rem; margin-bottom: 30px; }
.input-group { margin-bottom: 20px; }
.input-group label { display: block; margin-bottom: 8px; font-weight: 500; }
.input-group input { width: 100%; padding: 12px 16px; background: var(--bg-tertiary); border: 1px solid var(--border-color); border-radius: 8px; color: var(--text-primary); font-size: 1rem; }
.input-group input:focus { outline: none; border-color: var(--accent-sky); }
.form-options { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; font-size: 0.85rem; }
.remember-me { display: flex; align-items: center; gap: 8px; color: var(--text-secondary); cursor: pointer; }
.forgot-link { color: var(--accent-sky); text-decoration: none; }
.btn { width: 100%; padding: 14px 24px; border: none; border-radius: 8px; font-size: 1rem; font-weight: 600; cursor: pointer; transition: all 0.3s ease; }
.btn-primary { background: linear-gradient(135deg, var(--accent-sky) 0%, var(--accent-sky-dark) 100%); color: var(--bg-primary); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(0, 191, 255, 0.4); }
.login-footer { text-align: center; margin-top: 24px; color: var(--text-secondary); font-size: 0.9rem; }
.login-footer a { color: var(--accent-sky); text-decoration: none; }

.dashboard-page { display: flex; flex-direction: column; }
.navbar { background: var(--bg-secondary); border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 1000; }
.navbar-content { display: flex; justify-content: space-between; align-items: center; max-width: 1400px; margin: 0 auto; padding: 0 24px; height: 60px; }
.navbar-logo { font-size: 1.4rem; font-weight: 700; background: linear-gradient(135deg, var(--accent-sky-light) 0%, var(--accent-sky) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.nav-tabs { display: flex; gap: 4px; }
.nav-tab { padding: 10px 20px; color: var(--text-secondary); font-weight: 500; border-radius: 6px; border: none; background: transparent; cursor: pointer; transition: all 0.3s ease; }
.nav-tab:hover { color: var(--text-primary); background: var(--bg-tertiary); }
.nav-tab.active { color: var(--accent-sky); background: rgba(0, 191, 255, 0.1); }
.user-menu { display: flex; align-items: center; gap: 12px; }
.user-avatar { width: 36px; height: 36px; border-radius: 50%; background: linear-gradient(135deg, var(--accent-sky) 0%, var(--accent-sky-dark) 100%); display: flex; align-items: center; justify-content: center; font-weight: 600; color: var(--bg-primary); }
.logout-btn { padding: 8px 16px; background: transparent; border: 1px solid var(--border-color); color: var(--text-secondary); border-radius: 6px; cursor: pointer; }
.logout-btn:hover { border-color: var(--error); color: var(--error); }

.main-content { flex: 1; padding: 24px; max-width: 1400px; margin: 0 auto; width: 100%; }
.tab-content { display: none; }
.tab-content.active { display: block; }

.section-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; flex-wrap: wrap; gap: 16px; }
.section-title { font-size: 1.5rem; font-weight: 600; }
.section-title span { color: var(--accent-sky); }
.toolbar { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.search-box input { padding: 10px 16px; background: var(--bg-secondary); border: 1px solid var(--border-color); border-radius: 8px; color: var(--text-primary); width: 280px; }
.search-box input:focus { outline: none; border-color: var(--accent-sky); }
.dropdown { padding: 10px 16px; background: var(--bg-secondary); border: 1px solid var(--border-color); border-radius: 8px; color: var(--text-primary); cursor: pointer; }
.view-toggle { display: flex; gap: 4px; background: var(--bg-secondary); padding: 4px; border-radius: 8px; }
.view-btn { padding: 8px 12px; border: none; background: transparent; color: var(--text-secondary); border-radius: 6px; cursor: pointer; }
.view-btn.active { background: var(--bg-tertiary); color: var(--accent-sky); }
.btn-add { padding: 10px 20px; background: linear-gradient(135deg, var(--accent-sky) 0%, var(--accent-sky-dark) 100%); color: var(--bg-primary); border: none; border-radius: 8px; font-weight: 600; cursor: pointer; }
.btn-add:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(0, 191, 255, 0.3); }

.projects-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }
.project-card { background: var(--bg-card); border-radius: 12px; overflow: hidden; border: 1px solid var(--border-color); transition: all 0.3s ease; cursor: pointer; }
.project-card:hover { border-color: var(--accent-sky); transform: translateY(-4px); box-shadow: 0 12px 30px rgba(0, 191, 255, 0.15); }
.project-thumbnail { width: 100%; height: 180px; background: var(--bg-tertiary); display: flex; align-items: center; justify-content: center; overflow: hidden; position: relative; }
.project-thumbnail img { width: 100%; height: 100%; object-fit: cover; }
.project-thumbnail .placeholder { font-size: 3rem; opacity: 0.3; }
.project-info { padding: 16px; }
.project-title { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; }
.project-meta { display: flex; justify-content: space-between; align-items: center; color: var(--text-secondary); font-size: 0.85rem; }
.project-status { display: flex; align-items: center; gap: 6px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--success); }

.card-actions { position: absolute; top: 12px; right: 12px; display: flex; gap: 8px; opacity: 0; transition: opacity 0.3s ease; }
.project-card:hover .card-actions { opacity: 1; }
.card-actions .action-btn { width: 36px; height: 36px; border-radius: 8px; background: rgba(26, 26, 26, 0.95); border: 1px solid var(--border-color); color: var(--text-primary); cursor: pointer; display: flex; align-items: center; justify-content: center; }
.card-actions .action-btn.edit:hover { border-color: var(--accent-sky); color: var(--accent-sky); }
.card-actions .action-btn.delete:hover { border-color: var(--error); color: var(--error); }

.projects-list { display: flex; flex-direction: column; gap: 12px; }
.project-list-item { display: flex; align-items: center; gap: 16px; padding: 16px; background: var(--bg-card); border-radius: 12px; border: 1px solid var(--border-color); cursor: pointer; }
.project-list-item:hover { border-color: var(--accent-sky); }
.project-list-thumb { width: 80px; height: 60px; border-radius: 8px; background: var(--bg-tertiary); display: flex; align-items: center; justify-content: center; overflow: hidden; flex-shrink: 0; }
.project-list-thumb img { width: 100%; height: 100%; object-fit: cover; }
.project-list-info { flex: 1; }
.project-list-actions { display: flex; gap: 8px; }
.project-list-actions .action-btn { padding: 8px; background: transparent; border: 1px solid var(--border-color); border-radius: 6px; color: var(--text-secondary); cursor: pointer; }
.project-list-actions .action-btn:hover { border-color: var(--accent-sky); color: var(--accent-sky); }

.pagination { display: flex; justify-content: center; align-items: center; gap: 16px; margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--border-color); }
.page-btn { padding: 8px 16px; background: var(--bg-secondary); border: 1px solid var(--border-color); border-radius: 6px; color: var(--text-primary); cursor: pointer; }
.page-btn:hover:not(:disabled) { border-color: var(--accent-sky); color: var(--accent-sky); }
.page-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.page-info { color: var(--text-secondary); }

.modal-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0, 0, 0, 0.8); display: flex; align-items: center; justify-content: center; z-index: 2000; opacity: 0; visibility: hidden; transition: all 0.3s ease; }
.modal-overlay.active { opacity: 1; visibility: visible; }
.modal { background: var(--bg-card); border-radius: 16px; padding: 32px; width: 90%; max-width: 500px; border: 1px solid var(--border-color); transform: scale(0.9); transition: all 0.3s ease; position: relative; }
.modal-overlay.active .modal { transform: scale(1); }
.modal-header { margin-bottom: 24px; }
.modal-title { font-size: 1.3rem; font-weight: 600; }
.modal-close { position: absolute; top: 16px; right: 20px; background: none; border: none; color: var(--text-secondary); font-size: 1.8rem; cursor: pointer; }
.modal-close:hover { color: var(--text-primary); }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 8px; font-weight: 500; }
.form-group input, .form-group textarea { width: 100%; padding: 12px 16px; background: var(--bg-tertiary); border: 1px solid var(--border-color); border-radius: 8px; color: var(--text-primary); font-size: 1rem; }
.form-group textarea { min-height: 80px; resize: vertical; }
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--accent-sky); }
.form-actions { display: flex; gap: 12px; justify-content: flex-end; }
.btn-secondary { padding: 10px 20px; background: transparent; border: 1px solid var(--border-color); color: var(--text-primary); border-radius: 8px; cursor: pointer; }
.btn-secondary:hover { border-color: var(--text-primary); }

.placeholder-tab { text-align: center; padding: 80px 20px; color: var(--text-secondary); }
.placeholder-tab h2 { color: var(--text-primary); margin-bottom: 16px; }
.placeholder-tab .icon { font-size: 4rem; margin-bottom: 24px; opacity: 0.5; }

.file-upload { border: 2px dashed var(--border-color); border-radius: 8px; padding: 32px; text-align: center; cursor: pointer; transition: all 0.3s ease; }
.file-upload:hover { border-color: var(--accent-sky); background: rgba(0, 191, 255, 0.05); }
.file-upload input { display: none; }
.file-upload-text { color: var(--text-secondary); }
.file-upload-text span { color: var(--accent-sky); }

.notification { position: fixed; top: 20px; right: 20px; padding: 16px 24px; border-radius: 8px; font-weight: 600; z-index: 3000; background: var(--success); color: var(--bg-primary); }

@media (max-width: 768px) {
    .nav-tabs { display: none; }
    .section-header { flex-direction: column; align-items: flex-start; }
    .projects-grid { grid-template-columns: 1fr; }
}

/* Screenshot thumbnails */
.project-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
}
.project-list-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
}
.project-view-thumbnail img {
    object-position: top;
}