/* ─── Cut-AI Global Styles ────────────────────────────────────────────────── */

:root {
    --primary: #7C3AED;
    --primary-dark: #6D28D9;
    --primary-light: #C4B5FD;
    --accent: #1E1B4B;
    --bg: #f8f9fa;
    --card-bg: #ffffff;
    --text: #2c3e50;
    --text-secondary: #7f8c8d;
    --border: #ecf0f1;
    --success: #27ae60;
    --warning: #f39c12;
    --error: #e74c3c;
    --radius: 12px;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ─── Login Screen ────────────────────────────────────────────────────────── */

.login-screen {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    width: 100%;
    text-align: center;
}

.login-header { margin-bottom: 30px; }
.login-header h1 { color: var(--text); font-size: 2.5rem; margin-bottom: 10px; font-weight: 700; }
.login-header p { color: var(--text-secondary); font-size: 1.1rem; line-height: 1.6; margin-bottom: 20px; }

.value-prop { margin-bottom: 30px; }
.one-thing {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 15px;
}
.features-preview { display: flex; flex-direction: column; gap: 8px; }
.features-preview .feature { color: var(--text-secondary); font-size: 0.95rem; }

/* ─── Auth Forms ──────────────────────────────────────────────────────────── */

.auth-tabs { display: flex; margin-bottom: 24px; border-bottom: 2px solid var(--border); }
.auth-tab {
    flex: 1; padding: 12px; background: none; border: none; font-size: 1rem;
    font-weight: 600; color: #95a5a6; cursor: pointer; transition: var(--transition);
    border-bottom: 2px solid transparent; margin-bottom: -2px;
}
.auth-tab.active { color: var(--primary); border-bottom-color: var(--primary); }

.auth-form { display: none; flex-direction: column; gap: 16px; margin-bottom: 24px; }
.auth-form.active { display: flex; }

.form-input {
    width: 100%; padding: 14px 16px; border: 2px solid var(--border); border-radius: var(--radius);
    font-size: 1rem; transition: var(--transition); box-sizing: border-box;
}
.form-input:focus { border-color: var(--primary); outline: none; box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1); }

.submit-btn {
    width: 100%; padding: 16px; background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: white; border: none; border-radius: var(--radius); font-size: 1rem; font-weight: 600;
    cursor: pointer; transition: var(--transition); position: relative;
}
.submit-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(124, 58, 237, 0.3); }
.submit-btn:disabled { opacity: 0.7; cursor: not-allowed; transform: none; }
.submit-btn.loading .btn-text { visibility: hidden; }
.submit-btn.loading .btn-spinner { display: block; }

.auth-divider { display: flex; align-items: center; margin: 24px 0; color: #95a5a6; font-size: 0.9rem; }
.auth-divider::before, .auth-divider::after { content: ''; flex: 1; height: 1px; background: var(--border); }
.auth-divider span { padding: 0 12px; }

/* ─── Social Sign-In Buttons ──────────────────────────────────────────────── */

.social-signin-buttons { display: flex; flex-direction: column; gap: 15px; margin-bottom: 20px; }
.social-signin-btn {
    display: flex; align-items: center; justify-content: center; gap: 12px;
    padding: 18px 24px; border: 2px solid var(--border); border-radius: var(--radius);
    background: white; color: var(--text); font-size: 1rem; font-weight: 600;
    cursor: pointer; transition: var(--transition); position: relative;
}
.social-signin-btn:hover:not(:disabled) { border-color: var(--primary); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(124, 58, 237, 0.15); }
.social-signin-btn:disabled { opacity: 0.7; cursor: not-allowed; }
.social-signin-btn.loading { pointer-events: none; opacity: 0.8; }
.social-signin-btn.apple { border-color: #000; }
.social-signin-btn.apple:hover:not(:disabled) { border-color: #333; box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15); }
.social-signin-btn.google { border-color: #4285f4; }
.social-signin-btn.google:hover:not(:disabled) { border-color: #1a73e8; box-shadow: 0 8px 25px rgba(66, 133, 244, 0.15); }

.btn-icon { font-size: 1.2rem; width: 20px; height: 20px; display: flex; align-items: center; justify-content: center; }
.btn-spinner {
    width: 20px; height: 20px; border: 2px solid transparent; border-top: 2px solid currentColor;
    border-radius: 50%; animation: spin 1s linear infinite; display: none;
}
.social-signin-btn.loading .btn-icon { display: none; }
.social-signin-btn.loading .btn-spinner { display: block; }
.submit-btn .btn-spinner { position: absolute; left: 50%; top: 50%; margin-left: -10px; margin-top: -10px; border-color: rgba(255,255,255,0.3); border-top-color: white; }

@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

/* ─── Error / Trust / Back ────────────────────────────────────────────────── */

.error-message {
    background-color: #f8d7da; color: #721c24; border: 1px solid #f1b0b7;
    padding: 12px; border-radius: 8px; margin-bottom: 20px; display: none;
}
.error-message.show { display: block; }

.trust-signals { margin-top: 30px; text-align: left; }
.trust-item { display: flex; align-items: center; margin-bottom: 12px; color: var(--text-secondary); font-size: 0.9rem; }
.trust-icon { margin-right: 12px; font-size: 1.1rem; }

.back-link {
    position: absolute; top: 20px; left: 20px; color: white; text-decoration: none;
    font-weight: 600; display: flex; align-items: center; gap: 8px; padding: 10px 15px;
    border-radius: 8px; background: rgba(255,255,255,0.1); backdrop-filter: blur(10px); transition: var(--transition);
}
.back-link:hover { background: rgba(255,255,255,0.2); transform: translateX(-2px); }

.privacy-note { margin-top: 30px; font-size: 12px; color: var(--text-secondary); line-height: 1.5; text-align: center; }
.privacy-note a { color: var(--primary); text-decoration: none; }

/* ─── Buttons ─────────────────────────────────────────────────────────────── */

.btn-primary {
    background: var(--primary); color: white; border: none; padding: 12px 24px;
    border-radius: var(--radius); font-size: 1rem; font-weight: 600; cursor: pointer; transition: var(--transition);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.btn-secondary {
    background: transparent; color: var(--text); border: 2px solid var(--border); padding: 10px 20px;
    border-radius: var(--radius); font-size: 0.9rem; font-weight: 500; cursor: pointer; transition: var(--transition);
}
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); }

/* ─── Responsive ──────────────────────────────────────────────────────────── */

@media (max-width: 768px) {
    .login-screen { padding: 16px; position: relative; }
    .login-container { padding: 32px 24px; max-width: 100%; border-radius: 16px; margin-top: 60px; }
    .login-header h1 { font-size: 2rem; }
    .social-signin-btn { padding: 20px 24px; min-height: 56px; border-radius: 14px; }
    .back-link { position: absolute; top: 20px; left: 20px; font-size: 0.9rem; padding: 12px 16px; z-index: 100; }
}

@media (max-width: 480px) {
    .login-container { padding: 24px 20px; border-radius: 12px; margin-top: 50px; }
    .login-header h1 { font-size: 1.75rem; }
    .social-signin-btn { padding: 18px 20px; font-size: 0.95rem; }
}