:root {
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --accent-color: #38bdf8;
    --accent-hover: #0ea5e9;
    --border-color: #e2e8f0;
    --success-color: #10b981;
    --error-color: #ef4444;
    --hover-bg: #f1f5f9;
    --tg-bg: #e7ebf0;
    --tg-bubble: #ffffff;
    --tg-bubble-out: #effdde;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

[data-theme="dark"] {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --hover-bg: #334155;
    --tg-bg: #0f172a;
    --tg-bubble: #1e293b;
    --shadow: 0 10px 15px -3px rgb(0 0 0 / 0.3);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Inter', sans-serif; background-color: var(--bg-color); color: var(--text-primary); line-height: 1.5; transition: background-color 0.3s; min-height: 100vh; }

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

header.header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; flex-wrap: wrap; gap: 1rem; }

.card { background: var(--card-bg); border-radius: 1rem; border: 1px solid var(--border-color); padding: 1.5rem; box-shadow: var(--shadow); transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); }
.card:hover { transform: translateY(-2px); }

.btn { display: inline-flex; align-items: center; justify-content: center; padding: 0.625rem 1.25rem; border-radius: 0.75rem; font-weight: 500; font-size: 0.875rem; cursor: pointer; transition: all 0.2s; border: 1px solid transparent; gap: 0.5rem; text-decoration: none; outline: none; }
.btn-primary { background: var(--accent-color); color: white; border: none; }
.btn-primary:hover { background: var(--accent-hover); box-shadow: 0 4px 12px rgba(56, 189, 248, 0.4); }
.btn-secondary { background: var(--hover-bg); color: var(--text-primary); border-color: var(--border-color); }
.btn-secondary:hover { background: var(--border-color); }
.btn-sm { padding: 0.4rem 1rem; font-size: 0.75rem; }

.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; font-size: 0.875rem; font-weight: 600; margin-bottom: 0.5rem; color: var(--text-secondary); }
input, textarea, select { width: 100%; padding: 0.75rem 1rem; border-radius: 0.75rem; border: 1px solid var(--border-color); background: var(--bg-color); color: var(--text-primary); font-family: inherit; font-size: 0.875rem; transition: border-color 0.2s; }
input:focus, textarea:focus { outline: none; border-color: var(--accent-color); }

/* Telegram Preview */
.tg-preview-container { background: var(--tg-bg); border-radius: 1rem; padding: 1.5rem; display: flex; flex-direction: column; gap: 1rem; position: relative; overflow: hidden; border: 1px solid var(--border-color); max-width: 400px; width: 100%; margin: 0 auto; box-shadow: inset 0 2px 4px rgba(0,0,0,0.05); }
.tg-preview-header { font-size: 0.75rem; font-weight: 600; color: var(--accent-color); margin-bottom: 0.25rem; }
.tg-message-bubble { background: var(--tg-bubble); border-radius: 0.75rem; border-bottom-left-radius: 0.25rem; padding: 0.75rem; position: relative; box-shadow: 0 1px 2px rgba(0,0,0,0.1); width: fit-content; max-width: 100%; min-width: 200px; }
.tg-message-text { font-size: 0.9rem; white-space: pre-wrap; word-break: break-word; }
.tg-message-text b { font-weight: 700; }
.tg-message-text a { color: #2481cc; text-decoration: none; }
.tg-message-time { font-size: 0.65rem; color: var(--text-secondary); text-align: right; margin-top: 0.25rem; }

.tg-media-grid { display: grid; gap: 2px; border-radius: 0.5rem; overflow: hidden; margin-bottom: 0.5rem; }
.tg-media-grid div { background: var(--hover-bg); aspect-ratio: 16/9; position: relative; overflow: hidden; }
.tg-media-grid img, .tg-media-grid video { width: 100%; height: 100%; object-fit: cover; }

.tg-btn-grid { display: flex; flex-direction: column; gap: 4px; margin-top: 0.75rem; }
.tg-inline-btn { background: rgba(0, 0, 0, 0.4); color: white; padding: 0.6rem; border-radius: 0.5rem; text-align: center; font-size: 0.8rem; backdrop-filter: blur(8px); border: 1px solid rgba(255,255,255,0.1); }

/* Toasts */
.toast-container { position: fixed; bottom: 2rem; right: 2rem; display: flex; flex-direction: column; gap: 0.75rem; z-index: 1000; }
.toast { background: var(--card-bg); border: 1px solid var(--border-color); padding: 1rem 1.5rem; border-radius: 0.75rem; box-shadow: var(--shadow); display: flex; align-items: center; gap: 0.75rem; animation: slideInRight 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55); border-left: 4px solid var(--accent-color); color: var(--text-primary); min-width: 300px; }
.toast.success { border-left-color: var(--success-color); }
.toast.error { border-left-color: var(--error-color); }

@keyframes slideInRight { from { opacity: 0; transform: translateX(2rem); } to { opacity: 1; transform: translateX(0); } }

/* Dropzone */
.dropzone { border: 2px dashed var(--border-color); border-radius: 1rem; padding: 3rem 1rem; text-align: center; color: var(--text-secondary); cursor: pointer; transition: all 0.2s; position: relative; background: var(--card-bg); }
.dropzone.dragover { border-color: var(--accent-color); background: rgba(56, 189, 248, 0.05); }
.dropzone input { position: absolute; opacity: 0; width: 100%; height: 100%; top: 0; left: 0; cursor: pointer; }

/* Tabs */
.tabs { display: flex; gap: 2rem; border-bottom: 2px solid var(--border-color); margin-bottom: 2rem; overflow-x: auto; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tab-link { padding: 0.75rem 0; cursor: pointer; color: var(--text-secondary); border-bottom: 3px solid transparent; transition: all 0.2s; font-weight: 600; white-space: nowrap; }
.tab-link.active { color: var(--accent-color); border-bottom-color: var(--accent-color); }
.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeIn 0.4s ease-out; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* Toolbar */
.toolbar { display: flex; gap: 0.5rem; margin-bottom: 0.75rem; flex-wrap: wrap; }
.toolbar button { width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; border-radius: 0.5rem; font-weight: 600; background: var(--hover-bg); border: 1px solid var(--border-color); color: var(--text-primary); cursor: pointer; transition: all 0.2s; font-size: 0.85rem; }
.toolbar button:hover { background: var(--border-color); border-color: var(--text-secondary); }

/* Modern grid for history */
.history-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 1.5rem; }
.log-card { position: relative; padding: 1.25rem; font-size: 0.85rem; }
.log-status { position: absolute; top: 1.25rem; right: 1.25rem; padding: 0.25rem 0.5rem; border-radius: 0.5rem; font-size: 0.7rem; font-weight: 700; text-transform: uppercase; }
.log-status.success { background: rgba(16, 185, 129, 0.1); color: var(--success-color); }
.log-status.error { background: rgba(239, 68, 68, 0.1); color: var(--error-color); }

/* Layout Grid */
.layout { display: grid; grid-template-columns: 1fr 400px; gap: 2rem; align-items: start; }
@media (max-width: 1024px) { .layout { grid-template-columns: 1fr; } .tg-preview-container { max-width: 100%; } }