/* ============================================
   로그인 페이지 — Signal Rose
   ============================================ */

body.login-page {
    --login-rose: #e84a7f;
    --login-rose-deep: #b82d5c;
    --login-ink: #1c1520;
    --login-muted: #6f6170;
    --login-line: #eadde3;
    --login-surface: #fffafb;

    margin: 0;
    padding: 0;
    min-height: 100vh;
    height: 100vh;
    overflow: auto;
    display: flex;
    align-items: stretch;
    justify-content: stretch;
    position: relative;
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--login-ink);
    background:
        radial-gradient(ellipse 80% 60% at 12% 18%, rgba(255, 180, 205, 0.55) 0%, transparent 55%),
        radial-gradient(ellipse 70% 50% at 88% 82%, rgba(232, 74, 127, 0.22) 0%, transparent 50%),
        linear-gradient(160deg, #fff5f8 0%, #f7e4ec 42%, #f0d0dc 100%);
}

body.login-page::before,
body.login-page::after {
    display: none;
}

/* 분위기 레이어 */
.login-atmosphere {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.login-mesh {
    position: absolute;
    inset: 0;
    opacity: 0.35;
    background-image:
        linear-gradient(rgba(184, 45, 92, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(184, 45, 92, 0.06) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse 70% 60% at 30% 40%, #000 20%, transparent 75%);
}

.login-signal {
    position: absolute;
    border: 1.5px solid rgba(232, 74, 127, 0.28);
    border-radius: 50%;
    left: 18%;
    top: 42%;
    transform: translate(-50%, -50%);
    animation: signalPulse 7s ease-in-out infinite;
}

.login-signal-1 {
    width: 220px;
    height: 220px;
    animation-delay: 0s;
}

.login-signal-2 {
    width: 360px;
    height: 360px;
    animation-delay: 1.2s;
    opacity: 0.7;
}

.login-signal-3 {
    width: 520px;
    height: 520px;
    animation-delay: 2.4s;
    opacity: 0.45;
}

@keyframes signalPulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.35; }
    50%      { transform: translate(-50%, -50%) scale(1.04); opacity: 0.55; }
}

/* 전체 구성 */
.login-shell {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    width: 100%;
    min-height: 100vh;
}

/* ── 브랜드 히어로 ── */
.login-brand {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: clamp(48px, 8vw, 96px) clamp(40px, 7vw, 100px);
    animation: brandIn 0.8s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes brandIn {
    from { opacity: 0; transform: translateY(18px); }
    to   { opacity: 1; transform: translateY(0); }
}

.brand-kicker {
    margin: 0 0 18px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.28em;
    color: var(--login-rose-deep);
    text-transform: uppercase;
}

.brand-name {
    margin: 0;
    font-size: clamp(44px, 6.5vw, 78px);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.04em;
    color: var(--login-ink);
}

.brand-line {
    margin: 22px 0 0;
    max-width: 18em;
    font-size: clamp(16px, 1.6vw, 19px);
    font-weight: 500;
    line-height: 1.55;
    color: var(--login-muted);
    animation: brandIn 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.12s both;
}

/* ── 로그인 영역 ── */
.login-auth {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(32px, 5vw, 64px) clamp(24px, 4vw, 56px);
    background: rgba(255, 250, 251, 0.82);
    border-left: 1px solid rgba(184, 45, 92, 0.1);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    animation: authIn 0.75s cubic-bezier(0.22, 1, 0.36, 1) 0.08s both;
}

@keyframes authIn {
    from { opacity: 0; transform: translateX(24px); }
    to   { opacity: 1; transform: translateX(0); }
}

.login-auth-inner {
    width: 100%;
    max-width: 360px;
}

.login-logo {
    margin-bottom: 28px;
}

.logo-image {
    display: block;
    max-width: 96px;
    height: auto;
}

.login-title {
    margin: 0 0 8px;
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--login-ink);
}

.login-lead {
    margin: 0 0 28px;
    font-size: 14px;
    font-weight: 450;
    color: var(--login-muted);
}

.login-form .form-group {
    margin-bottom: 16px;
}

.login-form .login-name-group {
    margin-top: 2px;
}

.form-label {
    display: block;
    margin-bottom: 7px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--login-muted);
}

.login-form .form-group input {
    width: 100%;
    padding: 13px 14px;
    border: 1px solid var(--login-line);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    background: #ffffff;
    color: var(--login-ink);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    box-sizing: border-box;
}

.login-form .form-group input::placeholder {
    color: #b5a8b0;
}

.login-form .form-group input:focus {
    outline: none;
    border-color: var(--login-rose);
    box-shadow: 0 0 0 3px rgba(232, 74, 127, 0.14);
}

.login-button {
    width: 100%;
    margin-top: 10px;
    padding: 14px 16px;
    border: none;
    border-radius: 8px;
    background: var(--login-rose);
    color: #ffffff;
    font-size: 15px;
    font-weight: 650;
    font-family: inherit;
    letter-spacing: -0.01em;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease;
}

.login-button:hover {
    background: var(--login-rose-deep);
    transform: translateY(-1px);
}

.login-button:active {
    transform: translateY(0);
}

.login-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.login-error-message {
    display: none;
    margin-bottom: 18px;
    padding: 12px 14px;
    border: 1px solid #f3c4c4;
    border-radius: 8px;
    background: #fff5f5;
    color: #b42318;
    font-size: 13px;
    text-align: center;
}

.login-error-message.show {
    display: block;
    animation: shake 0.4s ease-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25%       { transform: translateX(-6px); }
    75%       { transform: translateX(6px); }
}

/* ============================================
   반응형
   ============================================ */
@media (max-width: 900px) {
    .login-shell {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr;
    }

    .login-brand {
        min-height: auto;
        padding: 48px 28px 28px;
        text-align: center;
        align-items: center;
    }

    .brand-line {
        max-width: none;
    }

    .login-signal {
        left: 50%;
        top: 18%;
    }

    .login-signal-3 {
        display: none;
    }

    .login-auth {
        border-left: none;
        border-top: 1px solid rgba(184, 45, 92, 0.1);
        align-items: flex-start;
        padding-top: 36px;
        padding-bottom: 48px;
        animation-name: brandIn;
    }

    .login-auth-inner {
        margin: 0 auto;
    }

    .login-logo {
        display: flex;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .login-brand {
        padding: 36px 20px 20px;
    }

    .brand-name {
        font-size: 36px;
    }

    .login-auth {
        padding: 28px 20px 40px;
    }

    .login-title {
        font-size: 24px;
    }

    .logo-image {
        max-width: 80px;
    }
}

@media (max-width: 900px) and (orientation: landscape) {
    .login-shell {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: 1fr;
    }

    .login-brand {
        text-align: left;
        align-items: flex-start;
        padding: 32px 28px;
    }

    .login-auth {
        border-left: 1px solid rgba(184, 45, 92, 0.1);
        border-top: none;
        align-items: center;
        padding: 28px 24px;
    }

    .login-logo {
        display: block;
    }

    .login-signal {
        left: 22%;
        top: 50%;
    }
}