/* ============================================================================
   Login / Register Page Styles
   ============================================================================
   기존 파스텔 synth 디자인 시스템과 통일된 스타일
   ============================================================================ */

/* --- 색상 변수 (index-style.css와 동일) --- */
:root {
    --bg-dark: #e8e3f3;
    --c-body-pink: #FFEBF0;
    --c-mint: #a7f3d0;
    --c-cream: #fffbeb;
    --c-lavender: #e9d5ff;
    --c-knob-blue: #bae6fd;
    --c-knob-yellow: #fde68a;
    --c-knob-pink: #fbcfe8;
    --c-heart-red: #ff90a4;
    --c-shadow-light: rgba(255, 255, 255, 0.6);
    --c-shadow-dark: rgba(0, 0, 0, 0.15);
    --c-text-grey: #71717a;
    --c-input-bg: #fff;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
    height: 100%;
    font-family: 'Noto Sans JP', 'M PLUS Rounded 1c', sans-serif;
    background: linear-gradient(135deg, #e8e3f3 0%, #FFEBF0 50%, #fffbeb 100%);
    overflow: hidden;
}

/* --- 메인 레이아웃 --- */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

/* --- 카드 --- */
.login-card {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 30px;
    padding: 40px 35px;
    width: 100%;
    max-width: 420px;
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.08),
        0 4px 20px rgba(0, 0, 0, 0.04),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    animation: cardSlideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
}

.login-card::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    height: 6px;
    background: linear-gradient(90deg, var(--c-mint), var(--c-lavender), var(--c-knob-pink), var(--c-knob-blue));
    border-radius: 30px 30px 0 0;
}

@keyframes cardSlideUp {
    from { opacity: 0; transform: translateY(30px) scale(0.97); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* --- 로고 / 헤더 --- */
.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-logo {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--c-lavender), var(--c-knob-pink));
    border-radius: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 16px;
    font-size: 32px;
    box-shadow: 0 8px 25px rgba(233, 213, 255, 0.5);
    animation: logoPulse 3s ease-in-out infinite;
}

@keyframes logoPulse {
    0%, 100% { transform: scale(1); box-shadow: 0 8px 25px rgba(233, 213, 255, 0.5); }
    50% { transform: scale(1.05); box-shadow: 0 12px 35px rgba(233, 213, 255, 0.7); }
}

.login-header h1 {
    font-size: 22px;
    color: #444;
    font-weight: 800;
    margin-bottom: 6px;
}

.login-header p {
    font-size: 13px;
    color: var(--c-text-grey);
}

/* --- 탭 전환 --- */
.tab-container {
    display: flex;
    background: #f1f5f9;
    border-radius: 14px;
    padding: 4px;
    margin-bottom: 28px;
}

.tab-btn {
    flex: 1;
    padding: 10px 0;
    border: none;
    background: transparent;
    border-radius: 11px;
    font-family: 'Noto Sans JP', 'M PLUS Rounded 1c', sans-serif;
    font-size: 14px;
    font-weight: 700;
    color: var(--c-text-grey);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.tab-btn.active {
    background: #fff;
    color: #444;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.tab-btn:hover:not(.active) {
    color: #555;
}

/* --- 폼 --- */
.form-container {
    position: relative;
    overflow: hidden;
}

.auth-form {
    display: none;
    flex-direction: column;
    gap: 16px;
    animation: formFadeIn 0.35s ease;
}

.auth-form.active {
    display: flex;
}

@keyframes formFadeIn {
    from { opacity: 0; transform: translateX(10px); }
    to { opacity: 1; transform: translateX(0); }
}

/* --- 입력 필드 --- */
.input-group {
    position: relative;
}

.input-group label {
    display: block;
    font-size: 12px;
    font-weight: 700;
    color: var(--c-text-grey);
    margin-bottom: 6px;
    margin-left: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-group input {
    width: 100%;
    height: 48px;
    background-color: var(--c-input-bg);
    border: 2px solid #e2e8f0;
    border-radius: 14px;
    padding: 0 16px 0 44px;
    font-family: 'Noto Sans JP', 'M PLUS Rounded 1c', sans-serif;
    font-size: 15px;
    color: #333;
    outline: none;
    transition: all 0.25s;
}

.input-group input:focus {
    border-color: var(--c-mint);
    box-shadow: 0 0 0 4px rgba(167, 243, 208, 0.2);
}

.input-group input::placeholder {
    color: #cbd5e1;
}

.input-icon {
    position: absolute;
    left: 14px;
    bottom: 14px;
    font-size: 16px;
    color: #cbd5e1;
    transition: color 0.25s;
}

.input-group input:focus + .input-icon,
.input-group input:not(:placeholder-shown) + .input-icon {
    color: var(--c-mint);
}

/* --- 에러 메시지 --- */
.error-msg {
    display: none;
    align-items: center;
    gap: 6px;
    padding: 10px 14px;
    background: #fef2f2;
    border: 1px solid #fecdd3;
    border-radius: 12px;
    font-size: 13px;
    color: #e11d48;
    animation: shakeError 0.4s ease;
}

.error-msg.show {
    display: flex;
}

@keyframes shakeError {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

/* --- 성공 메시지 --- */
.success-msg {
    display: none;
    align-items: center;
    gap: 6px;
    padding: 10px 14px;
    background: #f0fdf4;
    border: 1px solid #a7f3d0;
    border-radius: 12px;
    font-size: 13px;
    color: #065f46;
}

.success-msg.show {
    display: flex;
}

/* --- 제출 버튼 --- */
.submit-btn {
    width: 100%;
    height: 50px;
    border: none;
    border-radius: 14px;
    font-family: 'Noto Sans JP', 'M PLUS Rounded 1c', sans-serif;
    font-size: 16px;
    font-weight: 800;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 4px;
}

.submit-btn.login-submit {
    background: linear-gradient(135deg, var(--c-mint), #6ee7b7);
    color: #065f46;
    box-shadow: 0 4px 15px rgba(167, 243, 208, 0.5);
}

.submit-btn.login-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(167, 243, 208, 0.6);
}

.submit-btn.login-submit:active {
    transform: translateY(1px);
    box-shadow: 0 2px 8px rgba(167, 243, 208, 0.4);
}

.submit-btn.register-submit {
    background: linear-gradient(135deg, var(--c-lavender), #c4b5fd);
    color: #5b21b6;
    box-shadow: 0 4px 15px rgba(233, 213, 255, 0.5);
}

.submit-btn.register-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(233, 213, 255, 0.6);
}

.submit-btn.register-submit:active {
    transform: translateY(1px);
    box-shadow: 0 2px 8px rgba(233, 213, 255, 0.4);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* --- 로딩 스피너 --- */
.spinner {
    display: none;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* --- 하단 --- */
.login-footer {
    text-align: center;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid #f1f5f9;
}

.login-footer p {
    font-size: 12px;
    color: #94a3b8;
}

/* --- 장식용 원형 --- */
.deco-circle {
    position: fixed;
    border-radius: 50%;
    opacity: 0.15;
    pointer-events: none;
}

.deco-circle.c1 {
    width: 300px; height: 300px;
    background: var(--c-lavender);
    top: -80px; right: -80px;
}

.deco-circle.c2 {
    width: 200px; height: 200px;
    background: var(--c-mint);
    bottom: -60px; left: -60px;
}

.deco-circle.c3 {
    width: 150px; height: 150px;
    background: var(--c-knob-pink);
    bottom: 100px; right: -40px;
}

/* --- 반응형 --- */
@media (max-width: 480px) {
    .login-card {
        padding: 30px 24px;
        border-radius: 24px;
    }

    .login-logo {
        width: 60px;
        height: 60px;
        font-size: 26px;
    }

    .login-header h1 {
        font-size: 19px;
    }
}